"use strict";
const semver = require("semver"); // 比对node版本
const colors = require("colors"); // 给输入的提示加上颜色
const log = require("@akimixu-cli-dev/log");
const LOWEST_NODE_VERSION = "v16.0.0";

class Command {
  constructor(argv) {
    if (!argv) {
      throw new Error("参数不能为空！");
    }
    if (!Array.isArray(argv)) {
      throw new Error("参数必须为数组！");
    }
    if (argv.length < 1) {
      throw new Error("参数列表为空！");
    }
    //  console.log("Command constructor", argv);
    this._argv = argv;
    let runner = new Promise((resolve, reject) => {
      let chain = Promise.resolve();
      chain = chain.then(() => this.checkNodeVersion());
      chain = chain.then(() => this.initArgs());
      chain = chain.then(() => this.init());
      chain = chain.then(() => this.exec());
      chain.catch((err) => {
        log.error(err.message);
      });
    });
  }
  initArgs() {
    // 解析参数
    this._cmd = this._argv[this._argv.length - 1];
    this._args = this._argv.slice(0, this._argv.length - 1);
  }

  // 检查node版本好
  checkNodeVersion() {
    // 第一步：获取当前的版本号
    const currentVersion = process.version;
    const lowestVersion = LOWEST_NODE_VERSION;
    // 第二步：比对最低版本号
    if (!semver.gte(currentVersion, lowestVersion)) {
      throw new Error(
        colors.red(`akimixu0cli 需要安装 v${lowestVersion} 以上版本的Node.js`)
      );
    }
  }

  init() {
    throw new Error("init必须实现");
  }
  exec() {}
}

module.exports = Command;
